[Aavso-photometry] Short-Exposure Photometry

[Michael Koppelman]

Interesting. I was near A=1.0, D=16cm for me and t=10s and this give me 
an answer of 0.02. I presume that is magnitudes? If so, it seems pretty 
close. I think I was at about 0.03.

Thanks, that is interesting.

Michael

On Jul 13, 2004, at 3:27 PM, Radu Corlan wrote:

> I use the following formula for estimating scintillation (by Dravins i
> think):
>
> scint = (0.09 * A ^ 1.75) / (D ^ 0.66 * sqrt(2 * t))
>
> Where A is the airmass, D is the aperture in cm, t is the integartion 
> time
> in seconds. This formula excludes a correction for altitude (which only
> becomes significant above 1000-2000m or so). Scintillation also 
> depends on
> local conditions, of course - a factor of 0.5..3.0 could apply. But 
> it;s
> never an order of magnitude better (or worse).